Finding the Fourth Proportional to 7,945.50, 10,966.81 and 5,428.63

Step by Step Solution

1. Step 1: Write the proportion equation
   7,945.50 : 10,966.81 = 5,428.63 : x
2. Step 2: Convert to fraction form
   7,945.50/10,966.81 = 5,428.63/x
3. Step 3: Cross multiply
   7,945.50x = 10,966.81 × 5,428.63
4. Step 4: Simplify right side
   7,945.50x = 59,534,699.21
5. Step 5: Solve for x
   x = 59,534,699.21/7,945.50
6. Step 6: Final answer
   x = 7,492.88